China News Service, March 31, in response to foreign media reports that “some countries said that the three staff of Wuhan Virus Institute became ill in early and mid-November 2019, and their symptoms were consistent with the new crown pneumonia and influenza. It is judged that this may be the source of the new coronavirus." Tong Yigang, Dean of the School of Life Sciences of Beijing University of Chemical Technology and the Chinese leader of the Animal and Environmental Sciences Group of the Joint Expert Group, responded on the 31st that the Chinese expert group conducted an investigation and found no rumored Wuhan Institute of Virology. The illness of three staff members.

  On the afternoon of the 31st, the China-WHO New Coronavirus Traceability Joint Research Chinese Expert Group held a press conference on the joint research report.

When answering a reporter’s question, Tong Yigang said that the Chinese expert group reviewed some meeting records of the WHO-China Joint Expert Group’s visit to the Wuhan Institute of Virology on February 3, 2021, and restored the entire process of facts.

  "The process is like this. A researcher from Wuhan Institute of Virology was responding to the situation of Wuhan Institute of Virology's participation in the influenza surveillance system in cooperation with hospitals mentioned by foreign members of the WHO expert group. The Wuhan Institute of Virology and a hospital in Wuhan began a research work on influenza epidemic monitoring. This research work involved sample collection from January 2019 to January 2020. A total of 1,001 samples were collected. In March 2020, the Wuhan Institute of Virology carried out some testing work. Because they have the testing capabilities in this area, they conducted a retrospective screening of these samples and found that in January 2020, there were 700 samples. The 700 samples were part of the middle period from January 2019 to January 2020, that is, 700 samples collected in January 2020. 4 positive nucleic acid samples were found, that is, 4 influenza and new crown co-infections were found. In January 2020, because they were monitoring influenza data. Of the four positive criteria, 3 were adults and 1 was an elderly person. They were patients in cooperative hospitals, not employees of the Wuhan Institute." Tong Yigang said.

  Tong Yigang pointed out that their article has already been published. If you are interested, you can further study the detailed description in this article.